Doorcheck



l5, 1931. F. N. CARLSON DOORCHECK Filed May 11, 1929 3 Sheets-Sheet 1 gwumtoz Frirz N. Carlson Dec. 15, 1931. F. N. CARLSON DOORCHECK Filed May 11, 1929 3 Sheets-Sheet 2 Fritz N Garlson Dec. 15,-1931. F. N. CARLSON 1,836,013

DOORCHECK Filed May 11, 1929 5 Sheets-Sheet 3 A\ I I Fritz N. Carlson Patented Dec. 15, 1931 mm'rz n cmnsonrorMINNEAPOLIS, ivnnnnsorrn aioononncx A pplieat io nyfiledi m ..11 eze serial and, eeaasofingimpacts. 6 An object ofmy -invention is'toprov'idea simple, durable and inezqpensive door check that may be easily and quielily installed with ordinary household to'dls lby "unskilled" pe'r-,

sons and which will operate effectively to check theopeningswinging movement of a door'to whichit'is-applied. Another objectpf the invritionresidesin adapting in the combination, theusual tension spring customarily 'streth'ed be'tween -door 'frame and door "for -c1os'i'ng "the latter and in so arranging the' part's thatthe openingmovernent of'the doori-s ehe'ckedat that stage whe'rein saiditension spring'is-rendered edge of the door.

A' further object-of the invention resides 'in "providing a jointed armifor 'Iimiting the niovement'o'f thefloorand in'connecting said tension spring to one of the members of said arm-so that it willjoperate, not only'toc'lose the door, butalso tdbreak andiol'd'said-"arm as the dooris closed. v,

' Another object of the invention-residesconstructing one of 'the'members ofsaidarm so as to Ten der it extensible andin providing resilient means cooperating'with "the" extensible=member for the 'rpurpose of; resiliently checking the opening swinging movementof the doornt a predetermined stage therein. A feature of the invention-resides in constructing said "extensible member With overlapping portions'slidable'relativeto one another, and in -providi'n'g' a "compression icoil spring "en'ciroling' nd holding'togethei said practically" ineffective by being"beritover the' overlappin'gportions.

being shown in' open position;

I ot a-lly' connecte'd one to thegot her, by means further "obj ect of the invention resides tin forming the ends of-said ovellappingpor-' tionswith outwardly extending ears against which thefends of said coil spring arefadaptjed to seat.

WViththe foregoing andfother' objects "fin j vieiv whichfwill appear in the followinggdescription, "the inventlon resides in the novel combination andarrangementofpartsfiand i in the details'of' con s'truction' h'ereinaiterfgde- 00 scribed and claimed. 7

"bodying giny inventionrthe' sa me beinjg illus- "trated as applied to a door and door f at the latter being; partially t' close-the check; 1 1 v Fig. 2 is a view similar to .'Fig. 1', ex"cept that the 5 door is" shown-in its open position,

'Whereas' in Fig. 1, the door is*l0sed.- 5

. jFigQB is an elevation'alrview'oi the form-of I door checksho'vvn in -Figsfl, and f v Fig. 4 is a Ffragmentary 'perspeotivewiew r illustrating an outer doorianddoor-frame anda form ofmvinvention appliedfthereto', 7'

thedoorbeing shownclosed. Figf5'is apview similar to Fig. 4, the"door For thepurpose vof illustrating the" cation-10f the invention, "I have CShOWH {in the drawings, a part-of "an ordinary door "frame 10 including fstiles 11 and I a headerf12i In conjunction; with this door frame,' I-ha've shown an ordinary outer door lo hingedly oon'nected to'one of the stiles'ql by ahiir lig 14 upon which said door f nayfs'vvingfto and 'fro between (its 'closedpositiomlshownfin' Figs;1,1.3 anfd4, andiopen positions'jsiho vnjin FigsJQ and '5; Whenthe door '13iis closedjit abuts against thensual stops "i5jforme'd by .96

edges of the stiles ll-andiheaider' l2 will 3 readily become apparent; "thefinventioi1 may be applied to'any type of dooror framethe form shown being selected m' erely for the purpose-ofillustration; ff I 7 The invention proper eoniprise'sya' ointed 'arm A, which consists'oft-vvolinks orin'em-Q bers '18 a1'1d31 9, These 'tvgio links are prefer ably constructed of barmaterial and are pi'v:

of a rivet 20. The member 18 is pivoted by means of a cotter-pin 21 or other suitable pintle to a bracket 22 secured by screws 23 to the upper portion of door 13 at a suitable distance from the hinged edge thereof, while the member 19 is connected to the door frame header, 12 in a manner presently to be described. When the door 13 is closed these members 18 and 19 jack knife together in position along the upper portion of'th-e doorf as shown in Figs. 1,3.and-4.

'The member 19 of arm A consists of two portions 24 and 25 which overlap one another, as best shown in Figs. 3, 4 and 5. A cornpression coil spring 26 encircles the overlapping parts of said portions of'member 19 and serves to slidably support, the said portions relative o one another. The extremity" of the portion 25 is bentup' to provide an upstanding ear '27, while the extremity .of; the portion24 is bent down to provide a de- "pending ear 28. Theseears engage opposite ends of the spring 26, said spring being tadaptedflto be" brought intoaction upon the sliding (of link portions 24 and 25 I rela- 'tive to one another, occasioned by the extension of the member 19.v The end'of portion 25 of.1nember. 19,' opposite saidear27, isLzpivotally connQCted to the doo'rQ fr'ame header 12 by. means of .a' screw: 31. This screw is reinforced by passing the. same through a plate3'O, which is sec uredb'y screws 32tosaid header 12. I

I In conjunction with thejointed arm A, I employ an ordinary'tension coil spring 34 which in the usual manner, is hooked into a screw eye 36 or similar attaching device screwed into the stile 11 of the door frame 10. The other end of said spring 34, instead of being fastened to the door pro-per, ishgoked relatively. free, the spring-26 being fully expmaea, Upon the swinging of the door 13 outwardly, the spring 34, which at all times acts toiclose the door,,is additionally ten: sioned. .Asthe door op ens, the members 18 and 19 ofarm A'are swung about the pivot 20 and approach alignment. Throughout the major portion ofsaid'movement,the spring 34 alone is brought; into action," the same beingtensioned to return the door into closed position and at the same time exerting, a forcegupon the arm A, serving to retain "the members 18, and 19 thereof in broken relation. As the door nears its final open position, after having swung substantially ninety degrees, the member 19 of arm A is extended by the sliding of the portion 24 thereof relative to the portion 25. This brings the ears 27 and28 toward one another against the action of the spring 26, which is compressed between said ears. The compression of this spring serves to retard the final openingflofqthe. door and ultimately completely checks its opening movement, thus preventinginjury to the door, hinges and frame which otherwise might be caused through the violent opening of the door, as by the wind or otherwise. Throughout the final opening movement of the door,.the spring 34 also ex- .erts a, force tending to prevent the opening of the same and at the same time applies its force through the membe1y18jof .arm A in such a manneras to prevent the members 18 and 19v of said arm from everbecoming aligned andqthus locked on ormoyed past dead center. Due to this action the arm A is at all times; broken andis readilyfolded by the spring'34into position shown in Figs. 7

1, 3 and4, as thefdoor is closed by said spring.

Attentionis invited to Fig. 2 and the relative positions of the parts as thereindisclosed.

Here, it will be noted that the spring 34 in being bent over the inner edge of. the door 13 is so positioned as to exert a minimum force: against-the further opening of the door.

But. it will also be notedthat the resistance is against such openingofithe door at this i point is otherwise progressively increasing, due to the coming'into agtionfof the spring 26 of member 1950f the arm A; Thus, when the effectiveness of spring 34in resisting the opening movement of the door [is minimized.

the yieldinglyextensible arm 19 comes into plav to resist such movement of said door. 1 7 Having reference particularly to Figs.

and 4.it maybe seen that the;member 18 .of

arm A is connected by thepivot 20; not to the extremity of portion 24 ofmember 19. I but substantially short of the extremity thereof} In this construction an end-piece" 24 proiects-beyond the pivot 20.- an aperu .ture. 38being formed therein. This aperture registers with an aperture 39 in the member 18; when the parts take the relative positions these-.reglsterlng apertures. the user may 1nsert apin, nailor other suitablestopto keep thearm A from folding together unde'rthe action of the spring 34 andthus secure the door'in open position. r 1

Referring to Figs- 1, 3and 4. it maybe seen that the spring 34 suppo'rts the free end of the folded arm A, thus preventingv any objectionable sagging: of the structure. This provision permits of the employmentof loose ,onneotions between the member 18 and door 13 and between the member. 19and header shownin Figss2. 4 and 5 and through 12 and thus avoids the necessity of expensive and carefully fitted pivoting devices, such stock expedients as the screw 31 and cotterpin 21 being satisfactory for the purpose.

lVith my invention, the force of the door, upon being violently opened, is entirely absorbed, thus preventing injury to the door,

'door frame and hinges. The device is exceedingly simple in construction, comprising but thejointed arm and the two springs which function in a manner to cause the device to operate positively in all positions of the door.- The members of the jointed arm, due to the tension spring 34, may never come into alignment to interfere with the subsequent folding of the arm, regardless of the degree of opening of the door. Upon re outer doors, thereby making the invention particularly adaptable for application to existing building construction.

Changes'in the specific form of my invention, as herein disclosed, may be made within the scope of what is claimed without departing from the spirit of my invention.

Having described my invention, what I claim as new and desire to protect by Letters Patent is:

1. A door check for attachment to a swinging door and frame comprising a jointed arm connected to said door and to said frame for limiting the opening of the door, and a tension coil spring connected to the arm adjacent said door and to said frame. said coil spring exerting a force upon said arm tending to break the joint thereof and move the door toward its closed position.

2. A door check for attachment to a frame and to a door hinged thereto, said check comprising ointed arm including two members pivoted together. one member being pivotally connected with the door and the other member pivotally connected with the frame, one of said members being yieldingly extensible. and a tension coil spring attached at one end to the frame and at the other end thereof to one of said members, said spring acting upon the arm to fold the same and through the arm to close the door.

3. A door check for attachment to a frame and to a door hinged thereto, said check comprising an arm including two members, one pivotally connected at one end to the door and the other pivotally connectd at one end to the frame. the other end of one member being pivotally connected to the other memberat a point inside of the extremity thereof,

said extremity being formed with an aperture therein and, the other member being formed with a-- similar aperture, the two being'adaptedto register in an extended position of-thearm' ata predetermined stage in the opening of-the'door,saidapertures, when in registration, being adapted to; receive'a stoppi-n to 'lockthearm against folding and to, hold the door open.

4. Adoor check for attachment to a frame andia door hinged thereto, said check including afolding arm'comprising two members attached. to said door and to said frame and adapted to approach alignment upon the opening of the door, the lengthof said arm with the members in alignment being less than the dista-ncebetween thepoints of at tachment. of the members of said arm to said door and frame when the door is in open position, asprin'g connectedto said. arm inter-- mediate the ends thereof and to said door frame; forrmovmg SllCl. door nto closing position, said springoperating to fold'said arm; i 5. A door check for attachment. toa swinging: door, and1frame, said check including a jointed arm connected to said door and frame, resilient means for.'moving-saididoor into closing position, said arm having parts adapted to overly one; anotherfat; certain;

positions of the door, and means simultanef ously engaging both of saidparts-for holding said parts immovable to prevent the swinging of the arin'in either direction. 1

6. A door check for attachment to a frame 1 and to a door hinged thereto, said check comprisinga jointed arm connected to said door and to said frame,the member thereof connected with the frame being yieldably extensible and resilient means connected to the other member intermediate its ends and to the frame for urging the door closed.

7. A door check for attachment to a frame and to a door hinged thereto, said door check comprising a jointed arm, one of the membersthereof being pivoted to the door at a ioint remote from the axis of the hinge thereof, the other member thereof being pivoted to the door frame at a point remote from the axis of the door hinge and at a locality in proximity to-the pivot of the other member to the door when the door is in closed position, so as to cause the arms to swing substantially into the plane of the door when in closed position and a'tension coil spring connected atone end to said frame in proximity to-the axis of the door hinge and at its other end to the, member pivoted tov said door for urging said door closed and for breaking the joint of said arm.

8. A door check for attachment to a frame and to a door hinged thereto, saiddoor check comprising a ointed arm, one of the members thereof being pivoted to the door at a point remote from the axis of the hinge thereof, the

other member thereof being pivoted to the the door frame at a point remote from the axis of the door hinge and at a locality in proximity to the pivot of the other member to the door, When the door 'is in closed posi tion, so as to cause the arms to swing substantially into the plane of the door when in closed position and a tension coil spring connected at one end to said frame in proximity to the axisof the door hinge and at its other end to the member pivoted to said door for. urging said door closed and for breaking the joint of said arm, said spring being connected to the last named member intermediate its ends.

9. A door check for attachment to a swinging door frame comprising a jointed arm, pivoted at one end to the door and at the other. end tothe frame at points remote from the aXiso'f the door hinge, said arm being adapted upon the closing of the door to fold horizontally in the direction of the axis of the door hinge and a tension coil spring secured at one end to one of said arms outwardly from itspivot and at its other end to said door frame near the axis of the door hinge and at an elevation above that of said jointed arm, said spring operating to fold said" 7 arm to close the door and to support the arm against sagging When in its folded position. I v r 1 In testimony whereof I have aiiiXed my signature to this specification.

. FRITZ NQ CAR-LSON. 

